OOPs Day_02:
============
Methods with parameters:
========================
class class-name:
	def met1(self, par1, par2, par3, ..):
		implementation

# methods with parameters

class Student:
    def stuData(self,name, gender, section):
        self.name = name
        self.gender = gender
        self.section = section


    def printData(self):
        print(self.name)
        print(self.gender)
        print(self.section)

stu = Student()

stu.stuData("Ashok","Male","IX-C")
stu.printData()
	
===================================

Types of Variables:
===================
two types:
	1) Local Variables
	2) Global Variables

1) Local Variables
==================
the local variables are always allow to define within the particular block.
==> scope: limit to that particular block.

# Local Variables

def function():
    name = "Ashok"
    age = 36
    gender = "Male"

    print("Name = ",name)
    print("Age = ",age)
    print("Gender = ",gender)

# def fun():
#     print("Name = ",name)

function()
# print(name)
# fun()

=============================

Global Variable:
================
Global variables can always define at the beginning of the program
We can access in anywhere of the program.

# Global Variables

name = "Ashok"
age = 36
gender = "Male"

def function():
    print("Name = ",name)
    print("Age = ",age)
    print("Gender = ",gender)
    
def fun1():
    print("The Person {} is {} year's of old".format(name,age))


function()
print(name)
print(age)
print(gender)
fun1()

=====================================

# Global Variables

def fun1(a,b):
    print("Value1 = ",a)
    print("Value2 = ",b)

def fun2(p,q):
    if p > q:
        big = p
    else:
        big = q
    return big


"""
when the function or method of the class is not having any implementation to define, we can write those
with pass statement.

without implementation of function/method if we need to execute without error, we can use pass statement.
"""

a = int(input("Enter a:"))
b = int(input("Enter b:"))  # global variables

fun1(a = b,b = a)
print("Biggest value = ",fun2(a,b))

print(a)
print(b)

====================================

# Local Variable Vs Global variables

class localGlobal:
    a = 100
    b = 200

    def m1(self):
        p = 100
        print("Value1 = ",self.a)
        print("Value2 = ",self.b)

    def m2(self):
        print("Result = ",self.a + self.b)
        # print("p = ",p)

    print("Values of class = ",a,b)

lg = localGlobal()

lg.m1()
lg.m2()

print(lg.a)
print(lg.b)

==========================================

Changing of global variables:
=============================

# changing of global variables

a = 100
b = 200

def f1():
    print("Using Function:")
    print("a = ",a) # 100
    print("b = ",b) # 200

def f2():
    global a,b
    a = 200
    b = 400


# f2()

print("Outside the function:")
print("a = ",a) # 100
print("b = ",b) # 200


f1()    # 100 200

f2()

print("Outside the function:")
print("a = ",a) # 200
print("b = ",b) # 400

f1()

==============================

Method with Return Statement:
==============================

# Method with return statement

class Calculator:
    def m1(self,a,b):
        if a > b:
            big = a
        else:
            big = b
        return big

cobj = Calculator()

bigger = cobj.m1(100,200)

print("The Biggest number = ",bigger)

=======================================

Constructor:
============
==> a special method in python class
==> always named with: "__init__"
==> In Python, the constructor can always use for the data definition only, not for any implementation.
==> to convert the local variables into class variables, we can use "constructor".

Syntax:
	def __init__(self, par1, par2, ...):
		definition

==> The constructor need not be invoked extensively.
==> The constructor can be invoked automatically at the time of object creation.

# sending of data to the class.

# constructor can be used.

class Employee:
    def __init__(self,ename, erole, esal):
        # local data converting to the class data
        self.ename = ename
        self.erole = erole
        self.esal = esal

    def employeeData(self):
        print("Employee name = ",self.ename)
        print("Employee Role = ",self.erole)
        print("Employee salary = ",self.esal)

emp = Employee("Amisha", "Software Developer",100000)

emp.employeeData()